package main

import "unsafe"

const (
	Unknown = 0
	Female  = 1
	Male    = 2
)

const (
	a = "abc"
	b = len(a)
	c = unsafe.Sizeof(a)
)

func main() {
	println(a, b, c)
}

//func main() {
//	const LENGTH = 10
//	const WIDTH = 5
//	var area int
//	const a, b, c = 1, false, "str"
//	area = LENGTH * WIDTH
//	fmt.Printf("面积为：%d", area)
//	fmt.Println()
//	fmt.Println(a, b, c)
//}
